Tip for combined welding and cutting torches.



I. G. PETTIS.

TIP FUR CQMBINED WELDING ANDCUTTING ToBcHEs.

y APPLICATION FILED DEC. 14| 19:14.

'Eatented Feb. 22, 1916.

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UNITED STATES PATENT OFFICE.

JOHN G. PETTIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO TI-IAE IMPERIAL BRASS 'MANU- FACTURING- COMPANY, OF CHICAGO, ILLINOIS, A. CORPORATION OF ILLINOIS.

TIP FOR COMBINED WELDING .AND CUTTING TOROHES.

specification of rtters Patent.

Patented Feb. 2 2, 191. 6.

Application filed December 14, 1914. Serial No. 877,043.

1 'o all 'wil-0m t may concern:

Be it known that I, JOHN G. Pn'rrrs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Tips for Combined Welding and Cutting Torches, of which the following is a full, clear, and exact descrip# tion.

My invention relates to tips for combined welding and cutting torches, and particularly combined oxo-acetylene and oxygen gas torches. l

The object of my invention is, principally, to so construct the discharge end and so arrange the discharge orifices in the end of the tip that the accumulation of carbon therein andy consequent stoppage of any of saidV orifices or the burning away of any part of said discharge end will be avoided. This and other objects I accomplish by the means hereinafter fully described, and as particularly pointed out in the claims.

In the drawings: Figure 1 is a longitudinal section of a torch equipped with my improved tip. Fig. 2 is a transverse section taken on dotted line,2--2, Fig. 1. Fig. 3 is a section taken on dotted line 3 3, Fig'. 1. Fig. 4 is a transverse section taken on line 4 4, Fig. 1, drawn to a larger scale.

My improved torch tip is generally adapted to be used' in connection with the torch described in my lcti-pending application filed December 14, 1914, Serial No. 877,042, comprises an exterior casing consisting ofan upper and a lower tubular sec' tion, indicated by A and B inthe drawings. The bore of the lower 'portion'of the upper section A. is concentric to the axis thereof and extends to a point verynear the upper end of the section, which latter portion extends at an obtuse angle to the lower portion of the same. The upper end of the bore a of said upper section is reduced and the screw-threaded upper end of a longitudinally disposed tubular nozzle C is screwed therein. The lower wider portion of bore a is screw-threaded from its lower end to a point'a short distance below the reduced upper end of the same, and theupper reduced screw-threaded end b of the lower section B is 'adapted to be screwed into bore a until stopped by the circumferential collar (Z surrounding the same. The screwfthreaded upper end of the lower section is not as long as the wider part of bore a into which it is screwed, and a chamber D is thus formed between the upper end of section B and the upper end of the wider portion of bore a from which an oblique passage c leads that extends out through the angular upper portion of the upper section to the end thereof. The entrance of this passage e is screw-threaded and a suitable oxo-acetylene gas supply-pipe E is screwed into the same. f

The upper end of the bore of nozzle C communicates with an oblique passage f which is parallel tobut independent of passage e, and extends to the end of the 'oblique upper portion of section A and has a supply-pipe F screwed into 'it thatdischarges oxygen gas into said passage and nozzle.

The body of the nozzle C is, preferably, hexagonal from its upper threaded end to a circumferential groove g that surrounds it just above a head G on its lower end. The hexagonal shaped body of the nozzle enables it to fit snugly within the bore of the lower section of the casing, and at the same time leave longitudinal passages through which the oxo-acetylene gas is forced from chamber D into the annular chamber made by groove g, and from this annular chamber the gas is expelled through a series of equi-distant discharge orifices lc, 7c, that extend from said annular chamber to the extremity of the head, preferably, parallel to the sides of the same. The bore of nozzle C is reduced in diameter at its lower end to provide the discharge orifice K, and oxygen gas is forcibly expelled from this orifice in the center of the series of the oxoacetylene orifices.

In operation the presence of the annular chamber made by groove g ovens up the pressure of the gas just before it discharges from orifices k, 7c, and the convergence of said orifices causes the jets of gas issuing therefrom to combine and thoroughly mix with the oxygen gas issuing from said equi-- distant orifices at a suitable point away from the tip where the greatest heat is produced Experience has demonstrated that very little carbon is produced in my improved tip, but when carbon is produced it first collects in. said annular chamber, and should it collect in any of said orifices la to such aii extent as to materially interfere with the discharge of gas therethrough an explosion takes place in said chamber which clears said orices.

The discharge end of the bore of the lower section B of the casing is tapered to form a seat for the obversely tapered circumference of the head Gr so that when the upper end of the nozzle is screwed home in the upper sect-ion, and the lower section B of saidy casing is screwed into the lower screwthreaded end of thev upper section, thetapered circumferential sidesvof the head will fit tightly within the tapered mouth of the cliargerorifices K and i@ equidistant the endv of the tip will heat evenly and the expansion of the metal at this point will be even. As no gas can escape around the sides of the head and issues only from the orifices therein, a greater heat at one point than at an-y other is avoided and the burning away of the extremity of the tip is prevented.n In addition to this feature of my invention, its construction is such that no sharp angles are presented which will be burned away by the intense heat and thus the durabilityl of the vtip is greatly increased.

In order to reduce the temperature of the tip as much as possible, the nozzle is made of brass and the casing is made of bronze. The bronze being a greater conductor of heat than the brass and more susceptible to the temperature of thel outer-atmosphere Adraws the heat from ,the brassand keeps the teriperature of the tip lower than it would otherwise be, and in order to further accomplish this result, I provide the lower section B of the casing with longitudinal ribs or iins that extend from collar d to about the tapered lower portion of said lower` casing.

lVhat I claim as new is:

l. A tip for gas torches comprising a tubular casing having an upper section and a lower section; said sections being screwed together, a tubular nozzle screwed into the -upper section of the casingand extending through the lowei section, said nozzle having a tapered head and a circumferential peripheral groove near its dischargeend and also being provided with an axially extendina' discharge orifice, and a series ofrside dis- 'f-ii-ge orifices extending fromthe circum-A Hi-entiai peripheral groove outwardly ugh the head of said nozzle, and means for supplying dierent gases to'said axially extending discharge orifices and said circumferential peripheral groove.

2. Atip for gas torches comprising atu bular casing having an upper section and a l ing a tapered head and a circumferential4 side discharge orifices extending from the circumferential peripheral groove outwardly through the head of said nozzle and at converging angles to the axially extendingdischarge orifice, and means for supplying different gases to said axially extending discharge orifice and said circumferential pe-iripheral groove.

3. Atip for gas torches comprising a tu-` bular casing, a polygonal tubular nozzleextending longitudinally in said casing having a head provided. with a circumferentialv groove near `its discharge end, an axiallyextending discharge orifice, and a series of. equi-distant discharge orifices leading from said groove and arranged concentrically to said central orifice, a-nd means for supplying diderent gases to said central and to said surrounding series of orices.

4. A tip for gas torches comprising a tu-z bular casing, a polygonal tubular nozzle eX- i tending longitudinally in said casing and having a tapering head provided. with a circumferential peripheral groovev near its dir*- charge end constituting an annular gas chamber, an axially extending discharge opening and a series of side discharge openings extending from the circumferential peripheral groove outwardly through said head., the body of the nozzle in the rear of the groove being separated slightly from the surrounding wall of the casing to provide a gas passage-way to said groove, and means for supplying different gases to the axially extending discharge, and the gas 'ico passage-way leading to the circumferential peripheral groove.

5. A tip for gas torches comprising a tubular casing, a polygonal tubular nozzle extending longitudinallyy in said casing and having a tapering head provided with a circumferential peripheral groove near its discharge end constituting an annular gaschamber, an axially extending discharge opening and a series of-side discharge openings extending from the circumferential peripheral groove outwardly through said head, the body of the nozzle in the rear of the groove being separated slightly from the surrounding wall of the casing to provide a gas passageway to said groove and the fordifferent gase's'to the axially extending dis- Witne-eses.:

correspondi. the vtapering conformation ofv my hand this 4th day of Dcember,1914. he'v head of'the: 4nozzle 'gandfitted closely I aroudthe same, and means for supplying JOHN G.,:PE'1 `TI S.

cha'r'ge and the gas passageway' leading -to FRANKDTHOMASON; theoircu'mferential peripheral groove. -JOHN T. 

